Dividers.



No. 724,625. PATENTED APR. 7, 190a. J. v STEENBERGEN.

DIVIDERS.

APPLICATION FILED 001.4, 1902.

30 MODEL.

UNITED STATES PATENT OFFICE JACOB V. STEENBERGEN, OF HARRISBURG, SOUTHDAKOTA.

DIVIDERS.

SPECIFICATION forming part of Letters Patent No. 724,625, dated April 7,1903.

Application filed October 4.1902. Serial No. 125,919. (No model.)

To all whom it may concern:

Be it known that I, JAooB V. STEENBERGEN, a citizen of the UnitedStates, residing at Harrisburg, in the county of Lincoln, State of SouthDakota, have invented certain new and useful Improvements in Dividers;and I do hereby declare the following to be a full,clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This inventionrelates to dividers; and it has for its object to providea construction wherein there is provided a scale for determining theseparation of the points of the dividers and means for holding the legsof the dividers positively in their adjusted positions.

A further object of the invention is to provide a construction whereinafter the legs of the instrument are clamped they may be adjusted towardand away from each other within certain limits to rectify them or forother purposes. I

In the drawings forming a portion of this specification, and in whichlike numerals of reference indicate similar parts in both views, Figurel is a plan view showing the dividers. Fig. 2 is a section taken throughboth legs of the dividers and conforming to the curvature of the scale.

Referring now to the drawings, there is shown a pair of dividersincluding the legs 5 and 6, having a hinge connection 7 at one end andthe opposite or free ends of which in the present instance are pointed.Through theleg 5 is formed a perforation 8, in which is slidably engagedthe reduced end 9 of an arc-. shaped scale 10, the opposite end of whichis slidably engaged in the slot 11 in the legs 6 to permit of freemovement at times of the legs toward and away from each other. Thereduced end portion of the arc-shaped scale has shoulders 12 at itsinner end, and against these shoulders rests the end of a springplate13, which is riveted to the inner face of the leg 5 and has an opening14 at its free end, through which the reduced end of the scale ispassed. The reduced end portion of the scale at the opposite side fromthe springplate is screwthreaded and has engaged therewith a thumb-nut15, by manipulation of which the reduced portion of the scale may bedrawn through the leg 5 against the tendency of the spring, or the scalemay be released to permit of movement thereof longichangeably to holdthe scale against longitudinal movement through the slot of the leg 6.To move the spring 16 into engagementwith the scale and hold it in itsengaging position, a thumb-screw 17 is provided, which is passed looselythrough the perforation 18 of the spring-plate and engaged in thethreaded perforation 19 in the leg of the dividers, the edge of thespring-plate 16 acting as a gage up to which a mark upon the scale mustbe brought to give a corresponding separation of the points of thedividers. With this construction it will be seen that the dividers maybe adjusted toa fine degree of accuracy and may be held securely intheir adjusted positions. The thumb-screw provides for rectifying thedividers, as also for adjusting them to a slight degree in the taking ofmeasurements.

In practice modifications may be made and any suitable materials andproportions may be used for the various parts without departing from thespirit of the invention.

What is claimed is- The combination with a pair of dividers comprisinglegs pivotally connected, of a scale connected with one of the legs andslidably engaged through the other, the marks of the scale beingdepressed, a spring-plate attached to the upper face of the second leg,having a knife-edge projecting in the direction of the screw and adaptedto engage the depressions thereof interchangeably, the leg and the platehaving alining perforations therethrough, the perforation in the legbeing threaded, a thumb-screw passed through the perforation in theplate and engaged with the threads of the perforation in the leg, and aflange on the shank of the screw to engage the upper face of thespring-plate and move the plate in the direction of the scale. 7

In testimony whereof I affix my signature in presence of two witnesses.

JACOB V. STEENBERGEN.

Witnesses:

J. P. LANGNO, H. BAXTER.

ICO

